66.26% is the change from 409 to 680
Calculation steps:
[( 680 - 409 ) ÷ 409] x 100 = 66.26%
Formula
Percentage change = [(680 - 409) / 409] x 100
Subtract the new number by the original number
680 - 409 = 271
271 ÷ 409 = 0.6625916870415648
0.6625916870415648 x 100 = 66.26%